All I can do go shopping.
A.what;to B.which;is to
C.that;is to D.that;to
All I can do go shopping.
A.what;to B.which;is to
C.that;is to D.that;to
C
先行词是all,everything,nothing,anything,something,much,little,none等不定代词，引导定语从句用that。to go shopping作表语。